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Keystone Series GR ISO Butterfly Valves
Series GRW/GRL Butterfly Valves (ISO)
Keystone Series GR general purpose resilient seated butterfly valves are available in flanged, lugged or wafer body style for any service where drop-tight shut-off and maximum flow area is required.
Keystone Series GR ISO Butterfly Valves

Specs

Application
Cruise Ship, Cooling Water , Compressors , Air Circulation, Facilities & Process Utilities
Certifications
ABS, PED, DVWG, CUTR, CRN
End Connection
Wafer, Lugged
Material
Super Duplex, 316 Stainless Steel, Aluminum Bronze, Buna-N, Ductile Iron, Duplex, Epdm Rubber, Nylon
Media
Water Glycol, Water, Liquid, Air
Operating Temperature
Less than 150 C
Pressure Class
PN, ASME
Process Connection Type
PN16, 150RF
Seat/Seal Type
Resilient
Shutoff Class
Zero Leakage
Standards
ASME B16.34, API 609
Stem
O-ring
Valve Size
5 inch, NPS 10 / DN 250, NPS 12 / DN 300, NPS 14 / DN 350, NPS 18 / DN 450, NPS 2 / DN 50, NPS 20 / DN 500, NPS 2-1/2 / DN 65, NPS 24 / DN 600, NPS 3 / DN 80, NPS 30, NPS 36, NPS 4 / DN 100, NPS 6 / DN 150, NPS 8 / DN 200, NPS 16 / DN 400
Valve Size Standard
NPS, DN
Valve Type
Butterfly

Features

  • Double flanged body design with face-to-face dimensions, according to EN 558 Series 20, API 609 and AWWA C504 short.
  • Designed according to EN 593 and API 609.
  • The seat is field replaceable and fully isolates the body and shaft from the flow.
  • Primary shaft sealing exceeds the pressure rating of the valve and prevents leakage through the shaft area to the atmosphere.
  • A secondary shaft sealing provides back-up safety.
  • A molded-in O-ring in the seat for flange sealing eliminates the need for gaskets.
  • Shaft seals prevent moisture penetrating into the shaft area.
  • Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life, and drop-tight shut-off.